feat: 添加对Darwin和FreeBSD的GPU及操作系统名称获取功能

monitoring/unit/process_freebsd.go

@@ -0,0 +1,27 @@
+//go:build freebsd
+// +build freebsd
+
+package monitoring
+
+import (
+	"os/exec"
+	"strings"
+)
+
+// ProcessCount returns the number of running processes on FreeBSD
+func ProcessCount() (count int) {
+	return processCountFreeBSD()
+}
+
+// processCountFreeBSD counts processes using the `ps` command
+func processCountFreeBSD() (count int) {
+	cmd := exec.Command("ps", "-ax")
+	output, err := cmd.Output()
+	if err != nil {
+		return 0
+	}
+
+	// Count the number of lines in the output, excluding the header line
+	lines := strings.Split(string(output), "\n")
+	return len(lines) - 1
+}